A recent update to the gcc compiler (v4.8.3-5 x86_64) on 64-bit
cygwin leads to several new warnings about the implicit declaration
of the memmem(), strlcpy() and strcasestr() functions. For example:
CC archive.o
archive.c: In function 'format_subst':
archive.c:44:3: warning: implicit declaration of function 'memmem' \
[-Wimplicit-function-declaration]
b = memmem(src, len, "$Format:", 8);
^
archive.c:44:5: warning: assignment makes pointer from integer \
without a cast [enabled by default]
b = memmem(src, len, "$Format:", 8);
^
This seems to be caused by a change to the system headers which
results in the _XOPEN_SOURCE macro now having prioity over the
_GNU_SOURCE and _BSD_SOURCE macros (they are simply ignored).
This in turn leads to the declarations of the above functions
to be suppressed.
In order to suppress the warnings, don't define the _XOPEN_SOURCE
macro on cygwin
Signed-off-by: Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxx>
---
git-compat-util.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/git-compat-util.h b/git-compat-util.h
index 400e921..cef2691 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -75,7 +75,8 @@
# endif
#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
!defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
- !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__)
+ !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
+ !defined(__CYGWIN__)
#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
--
2.1.0
--
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